WILL-WETZLAR MAGINON 200/3.5

[martyn_bannister]

Managed to botch up a mount for this all-plastic projector(?) lens onto my M42 bellows.





100% centre crop at infinity - not much CA

As expected, contrast isn't great - but painting the inside of the "mount" with matt black paint might help. Focusing closer and closer.....






Next door's cat thinks I am mad.


Sort of an OK fun lens for £1.99, but not really anything fantastic

[iangreenhalgh1]

Yup, it's a projector lens, I nearly bid on it myself but bought an Enna projector lens for 99p instead with 5 quid postage.

I have a few projector lenses, what I'm planning to do to be able to mount and focus them is buy an old projector and remove the lens tube from it then put an EOS mount on the back of that tube, the projector lenses then screw into this as they have that large thread for focussing.

[martyn_bannister]

[iangreenhalgh1]

Good point about the bellows, I just want to try the tube idea as bellows are a bit cumbersome, especially with the smaller projector lenses, seems like overkill.

Nice work on the lathe, never used one myself apart from turning wood at school.

[ForenSeil]

I also made such a conversion to m42 once, but without a bellows





I was able to use the screw for focussing, instead of the bellows.
But I think a bellows would be the better solution.

I didn't used it much as it wasn't good and wasn't producing any special effects etc.

[martyn_bannister]

Neatly done though and more contrast, no doubt due to less light leaking in

[iangreenhalgh1]

I found with using enlarger and projector lenses you need a good hood.

Lack of contrast is a problem I've often run into with them.

I love to see people doing this kind of experiemntal work though, thanks for sharing martin.

[walter g]

Here's my setup for testing Projector lenses.I need to get tht lens back out and try it on my 10D.
http://forum.mflenses.com/projection-zoom-4-to-6-f3-5-t32387.html

[martyn_bannister]

[buerokratiehasser]

They also make some nice macro lenses for point and shoots, although this is basically a mechanical issue (their mount and lens hood makes it easy to hold and center them before the P&S lens, depending on model)

They make only weak loupes with focal lengths of 85mm or more, TV lenses (15-20 mm) are better

[Lloydy]

The Isco-Gottingen Projar 85mm f2.8 projector lens.


The two parts of the 'bodgit and run' lens. The lens itself has about 1mm thickness of of wide tape wrapped around the focusing thread so it's a tight fit in the 'female' part of the contraption.
Which is; a T2 Pentax mount that has the centre part removed ( or lost in my case ) and has a 50mm length of plastci tube jammed in and held with more tape. The tube is a piece of the cartridge that stuff like silicone sealant comes in, bathroom sealer.


The iside of the lens, showing the 'aperture'. This is a foam rubber thingy that comes in the packs of 100 DVD or CD discs and stops them vibrating in transit. But a bit of cardboard would suffice.


The lens in all its glory on my K10. As you can see the lens part slides, trombone like, in the part attached to the camera and allows focusing. The K10 actually registers the focus and the stop down lever determines the speed as it would with any manual lens.


Shot at about a distance of 1 meter, not bad ?


Again, this was about 1 meter away and shows the small DOF.


My favourite target, the church clock which is infinity on any lens. The thing that amazes me is the complete lack of fringing, which in shots like this I have had from well respected lenses. The sharpness is good as well, I've zoomed this and it's way better than expected.


These flowers were about 3 meters away, and I think this is a great shot considering the lens. I'm actually pleased with this.

[iangreenhalgh1]

Very nice mate, does indeed look like a good lens. I have a Rollei Vario-Projar I need to mount for my EOS, it's brand new but made in the early 70s, it was made by ISCO for Rollei so I hope it's as nice as that ISCO you have.

[martyn_bannister]

Lloydy - excellent results from a marvellous contraption. I suspect good lens to start with, combined with attention to detail in the mount, gives results like this. I also wonder how much the aperture helps the sharpness??? Certainly a keeper!

[Lloydy]

I will lock myself away in the 'Centre of Engineering Excellence' and manufacture a smaller aperture and see what the results are like. ( I'll cut some cardboard on the desk and try it )

[martyn_bannister]

Men in sheds rule!!!!

[iangreenhalgh1]

I have been trying out some homemade aperture disks on my huge Rathenower projector lens.

I like the effect this one gives:




I used a slot cutter in my dremel to cut up a baked bean tin lis then painted it matt black, works well.

I made a few others as well, fun to play with and creates strange effects sometimes.

[RioRico]

[martyn_bannister]

would be interesting to see the effect on the bokeh of a hole, but with "ninja star" edges........